package com.wjh.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.wjh.entities.CommonResult;
import com.wjh.entities.Payment;
import com.wjh.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
@Slf4j
public class CircleBreakerController {

    public static final String SERVICE_URL = "http://nacos-payment-provider";

    @Resource
    private RestTemplate restTemplate;

    @RequestMapping("/consumer/fallback/{id}")
//    @SentinelResource(value = "fallback")
//    @SentinelResource(value = "fallback", fallback = "handlerFallback")
//    @SentinelResource(value = "fallback", blockHandler = "blockHandler")
    @SentinelResource(value = "fallback", fallback = "handlerFallback", blockHandler = "blockHandler",
                        exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(SERVICE_URL + "/paymentSQL/" + id, CommonResult.class, id);
        if (id == 4){
            throw new IllegalArgumentException("IllegalArgumentException, 非法参数异常");
        }else if(result.getData() == null) {
            throw new NullPointerException("NullPointerException, 该id没有对应记录，空指针异常");
        }
        return result;
    }
    public CommonResult handlerFallback(@PathVariable Long id, Throwable e){
        Payment payment = new Payment(id, "null");
        return new CommonResult(444, "兜底异常handlerFallback，exception内容:" +e.getMessage(), payment);
    }

    public CommonResult blockHandler(@PathVariable Long id, BlockException exception){
        Payment payment = new Payment(id, "null");
        return new CommonResult(445, "blockHandler 限流，无此流水: BlockException" +exception.getMessage(), payment);
    }

    //openfeign
    @Resource
    private PaymentService paymentService;

    @GetMapping("/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id){
        return paymentService.paymentSQL(id);
    }
}
